Construction of a triazine polycarboxylate Co-MOF with flexible and rigid coordination arms as well as excellent catalytic reduction and adsorption properties

Liu, Min; Cai, Hequn; Jiang, Shan; Ye, Xing; Xing, Yong Heng

doi:10.1039/d3dt00519d

Dalton Trans.

2023

DOI: 10.1039/d3dt00519d

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Construction of a triazine polycarboxylate Co-MOF with flexible and rigid coordination arms as well as excellent catalytic reduction and adsorption properties

Min Liu

Hequn Cai

Shan Jiang

et al.

Abstract: A new compound [Co2(H2BATD)(DMF)2]·2.5DMF·0.5H2O (1) was synthesized from the triazine ligand H6BATD (H6BATD =5, 5'-((6-biscarboxymethylamino-1, 3, 5-triazine-2, 4-diyl) bis (azadiyl), DMF= N, N-Dimethylformamide) and Co(NO3)2·6H2O. Compound 1 is characterized by...

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Cited by 3 publications

References 79 publications

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Optimizing Iodine Enrichment through Induced‐Fit Transformations in a Flexible Ag(I)‐Organic Framework: From Accelerated Adsorption Kinetics to Record‐High Storage Density

Xiao,

Tian,

Jiang

et al. 2024

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Efficient capture and storage of radioactive I2 is a prerequisite for developing nuclear power but remains a challenge. Here, two flexible Ag‐MOFs (FJI‐H39 and 40) with similar active sites but different pore sizes and flexibility are prepared; both of them can capture I2 with excellent removal efficiencies and high adsorption capacities. Due to the more flexible pores, FJI‐H39 not only possesses the record‐high I2 storage density among all the reported MOFs but also displays a very fast adsorption kinetic (124 times faster than FJI‐H40), while their desorption kinetics are comparable. Mechanistic studies show that FJI‐H39 can undergo induced‐fit transformations continuously (first contraction then expansion), making the adsorbed iodine species enrich near the Ag(I) nodes quickly and orderly, from discrete I− anion to the dense packing of various iodine species, achieving the very fast adsorption kinetic and the record‐high storage density simultaneously. However, no significant structural transformations caused by the adsorbed iodine are observed in FJI‐H40. In addition, FJI‐H39 has excellent stability/recyclability/obtainability, making it a practical adsorbent for radioactive I2. This work provides a useful method for synthesizing practical radioactive I2 adsorbents.

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Optimizing Iodine Enrichment through Induced‐Fit Transformations in a Flexible Ag(I)‐Organic Framework: From Accelerated Adsorption Kinetics to Record‐High Storage Density

Xiao,

Tian,

Jiang

et al. 2024

Small

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Metal−organic framework constructed by flexible ligands: A versatile platform towards efficient fluorescence sensing, adsorption separation and heterogeneous catalysis

Zhao,

Miao

2024

Coordination Chemistry Reviews

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Construction of Ketoenamine-Based Covalent Organic Frameworks with Electron-Rich Sites for Efficient and Rapid Removal of Iodine from Solution

Tao,

Zhang,

Jing

et al. 2023

Molecules

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Porous covalent organic frameworks (COFs) have been widely used for the efficient removal of iodine from solution due to their abundance of electron-rich sites. In this study, two kinds of ketoenamine-based COFs, TpBD-(OMe)2 and TpBD-Me2, are successfully synthesized via Schiff base reaction under solvothermal conditions using 1, 3, 5-triformylphoroglucinol as aldehyde monomer, o-tolidine and o-dianisidine as amino monomers. The ability of TpBD-(OMe)2 and TpBD-Me2 to adsorb iodine in cyclohexane or aqueous solutions has been quantitatively analyzed and interpreted in terms of adsorption sites. TpBD-Me2 possesses two adsorption sites, -NH- and -C=O, and exhibits an adsorption capacity of 681.67 mg/g in cyclohexane, with an initial adsorption rate of 0.6 g/mol/min with respect to COF unit cell. The adsorption capacity of TpBD-(OMe)2 can be as high as 728.77 mg/g, and the initial adsorption rate of TpBD-(OMe)2 can reach 1.2 g/mol/min in the presence of oxygen atoms between the methyl group and the benzene ring. Compared with TpBD-Me2, the higher adsorption capacity and adsorption rate of TpBD-(OMe)2 towards iodine are not only reflected in organic solvents, but also in aqueous solutions. It is proven through X-ray photoelectron spectroscopy and Raman spectroscopy that iodine exists in the form of I2, I3−, and I5− within TpBD-(OMe)2 and TpBD-Me2 after adsorption. This work not only expands the application of COFs in the field of iodine adsorption, but also provides research ideas and important an experimental basis for the optimization of iodine adsorption sites.

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Construction of a triazine polycarboxylate Co-MOF with flexible and rigid coordination arms as well as excellent catalytic reduction and adsorption properties

Abstract: A new compound [Co2(H2BATD)(DMF)2]·2.5DMF·0.5H2O (1) was synthesized from the triazine ligand H6BATD (H6BATD =5, 5'-((6-biscarboxymethylamino-1, 3, 5-triazine-2, 4-diyl) bis (azadiyl), DMF= N, N-Dimethylformamide) and Co(NO3)2·6H2O. Compound 1 is characterized by...

Cited by 3 publications

References 79 publications

Optimizing Iodine Enrichment through Induced‐Fit Transformations in a Flexible Ag(I)‐Organic Framework: From Accelerated Adsorption Kinetics to Record‐High Storage Density

Optimizing Iodine Enrichment through Induced‐Fit Transformations in a Flexible Ag(I)‐Organic Framework: From Accelerated Adsorption Kinetics to Record‐High Storage Density

Metal−organic framework constructed by flexible ligands: A versatile platform towards efficient fluorescence sensing, adsorption separation and heterogeneous catalysis

Construction of Ketoenamine-Based Covalent Organic Frameworks with Electron-Rich Sites for Efficient and Rapid Removal of Iodine from Solution

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